/* SPDX-License-Identifier: GPL-2.0 *//* * uClinux flat-format executables * * Copyright (C) 2005 John Williams <jwilliams@itee.uq.edu.au> */ #ifndef _ASM_MICROBLAZE_FLAT_H#define _ASM_MICROBLAZE_FLAT_H #include <linux/unaligned.h> /* * Microblaze works a little differently from other arches, because * of the MICROBLAZE_64 reloc type. Here, a 32 bit address is split * over two instructions, an 'imm' instruction which provides the top * 16 bits, then the instruction "proper" which provides the low 16 * bits. */ /* * Crack open a symbol reference and extract the address to be * relocated. rp is a potentially unaligned pointer to the * reference */ static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,					u32 *addr){	u32 *p = (__force u32 *)rp; 	/* Is it a split 64/32 reference? */	if (relval & 0x80000000) {		/* Grab the two halves of the reference */		u32 val_hi, val_lo; 		val_hi = get_unaligned(p);		val_lo = get_unaligned(p+1); 		/* Crack the address out */		*addr = ((val_hi & 0xffff) << 16) + (val_lo & 0xffff);	} else {		/* Get the address straight out */		*addr = get_unaligned(p);	} 	return 0;} /* * Insert an address into the symbol reference at rp. rp is potentially * unaligned. */ static inline intflat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 relval){	u32 *p = (__force u32 *)rp;	/* Is this a split 64/32 reloc? */	if (relval & 0x80000000) {		/* Get the two "halves" */		unsigned long val_hi = get_unaligned(p);		unsigned long val_lo = get_unaligned(p + 1); 		/* insert the address */		val_hi = (val_hi & 0xffff0000) | addr >> 16;		val_lo = (val_lo & 0xffff0000) | (addr & 0xffff); 		/* store the two halves back into memory */		put_unaligned(val_hi, p);		put_unaligned(val_lo, p+1);	} else {		/* Put it straight in, no messing around */		put_unaligned(addr, p);	}	return 0;} #define	flat_get_relocate_addr(rel)	(rel & 0x7fffffff) #endif /* _ASM_MICROBLAZE_FLAT_H */